“JavaScript Regex Exemplo correspondente” Respostas de código

Regex corresponde palavra js

let string = "Hello world"; // you can use .toLowerCase() to check only in lower

let match = "world"; // word to match

let regex = new RegExp('\\b('+match+')\\b');

console.log('true for no match, false for match');
console.log(string.match(regex) == null); //.match() returns array of words found

// true for no match, false for match
// false
L'homme habile

JavaScript Regex Exact Match

var r = /^a$/

function matchExact(r, str) {
   var match = str.match(r);
   return match && str === match[0];
}
Krushn

JavaScript Regex Exemplo correspondente

//Declare Reg using slash
let reg = /abc/
//Declare using class, useful for buil a RegExp from a variable
reg = new RegExp('abc')

//Option you must know: i -> Not case sensitive, g -> match all the string
let str = 'Abc abc abc'
str.match(/abc/) //Array(1) ["abc"] match only the first and return
str.match(/abc/g) //Array(2) ["abc","abc"] match all
str.match(/abc/i) //Array(1) ["Abc"] not case sensitive
str.match(/abc/ig) //Array(3) ["Abc","abc","abc"]
//the equivalent with new RegExp is
str.match('abc', 'ig') //Array(3) ["Abc","abc","abc"]
POG

Como usar a função de correspondência em javascript para regex

const str = 'For more information, see Chapter 3.4.5.1';
const re = /see (chapter \d+(\.\d)*)/i;
const found = str.match(re);

console.log(found);

// logs [ 'see Chapter 3.4.5.1',
//        'Chapter 3.4.5.1',
//        '.1',
//        index: 22,
//        input: 'For more information, see Chapter 3.4.5.1' ]

// 'see Chapter 3.4.5.1' is the whole match.
// 'Chapter 3.4.5.1' was captured by '(chapter \d+(\.\d)*)'.
// '.1' was the last value captured by '(\.\d)'.
// The 'index' property (22) is the zero-based index of the whole match.
// The 'input' property is the original string that was parsed.
Helpless Hamster

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